Study of strain in partially relaxed Ge epilayers on Si(100) substrate

作者: Z. M. Jiang , C. W. Pei , X. F. Zhou , W. R. Jiang , B. Shi

DOI: 10.1063/1.124378

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摘要: Ge epilayers of different thicknesses are grown by molecular-beam epitaxy with Sb as a surfactant on Si(100) substrates. X-ray diffraction illustrates that these thin films partially strained, and the strains decrease gradually increasing epilayer thickness. Raman spectra reveal downward shift Ge–Ge mode peak thickness increases. In regions high strain, relationship between this strain in relaxed samples is considerably from linear reported before, which mainly attributed to spatial confinement effect phonons nanocrystal.

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